diff options
| author | Christoph Hellwig <hch@lst.de> | 2013-04-03 16:11:14 +1100 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-04-21 14:55:34 -0500 |
| commit | 77c95bba013089fa868217283eb6d98a05913e53 (patch) | |
| tree | 7b694c2baa200ac1bf2770d7bdfa4f2a292a2a58 /fs/xfs/xfs_fsops.c | |
| parent | 4e0e6040c4052aff15a494ac05778f4086d24c33 (diff) | |
| download | lwn-77c95bba013089fa868217283eb6d98a05913e53.tar.gz lwn-77c95bba013089fa868217283eb6d98a05913e53.zip | |
xfs: add CRC checks to the AGFL
Add CRC checks, location information and a magic number to the AGFL.
Previously the AGFL was just a block containing nothing but the
free block pointers. The new AGFL has a real header with the usual
boilerplate instead, so that we can verify it's not corrupted and
written into the right place.
[dchinner@redhat.com] Added LSN field, reworked significantly to fit
into new verifier structure and growfs structure, enabled full
verifier functionality now there is a header to verify and we can
guarantee an initialised AGFL.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_fsops.c')
| -rw-r--r-- | fs/xfs/xfs_fsops.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index b6cca27e9132..a693a54799e5 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -268,6 +268,11 @@ xfs_growfs_data_private( } agfl = XFS_BUF_TO_AGFL(bp); + if (xfs_sb_version_hascrc(&mp->m_sb)) { + agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC); + agfl->agfl_seqno = cpu_to_be32(agno); + uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_uuid); + } for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++) agfl->agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK); |